What does the old saying "Corn Belt soybeans never leak out nine out of ten years" mean?

In rural areas of our country, farmers have also summed up many corresponding proverbs based on their many years of planting experience, such as "Corn Belt Soybeans, never leak out in nine out of ten years". What this sentence means is that corn and soybeans are planted together. Both crops are planted on the same piece of land, scattered high and low, and then there will be a bumper harvest in 9 years out of 10 years, and there may be only one year where the harvest is not good. Great. The main meaning of this sentence is that planting some soybeans in corn fields will yield better results.

In agricultural production, there is a professional term called interplanting, which means planting some soybeans in the air under the corn field. The corn grows very tall, while the soybeans grow very short. , the two plants grow without interfering with each other. This can indeed use space very effectively. Corn and soybeans grow at different spatial levels and do not interfere with each other. Moreover, interplanting these two crops can save resources. Like in the past, there was not much fertile land in rural areas, so this method can save cultivated land resources.

Among many crops, soybeans are the first choice of farmers for interplanting, because there are many rhizobia bacteria in soybeans, which can absorb some nitrogen from the air and store it in the soil. It can also be converted into nitrogen fertilizer. There are also many probiotics on the root system of soybeans. When planted in the soil, it can also improve the overall condition of the soil. The soil's air permeability will be better, and the soil will become more fertile.

Every farmer hopes to have a good harvest on his land when planting. Planting corn and soybeans together can achieve a double harvest, which can greatly improve his planting efficiency. Because in the past few decades, almost all farmers have been grabbing farmland resources and hope to have more food crops in their fields. However, when farmland resources were not sufficient at that time, farmers had to use every inch of land very rationally. Planting corn and soybeans together can maximize profits.